I'm experiencing this as well. When I try to install gnome-control- center I get:
sudo apt install gnome-control-center dave@dave-K55A:~$ sudo apt install gnome-control-center [sudo] password for dave: Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: gnome-control-center : Depends: colord (>= 0.1.30) E: Unable to correct problems, you have held broken packages. I haven't fiddled with anything, I haven't moved the dock... How can I be missing colord, system settings? I've got to calibrate and profile a new monitor. I'm not a noob, I just install or update and work. I don't mess with anything! -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1721637 Title: can't open system settings(Ubuntu 17.10), icon is visible but settings don't display Status in gnome-control-center package in Ubuntu: Incomplete Bug description: When i click on system settings, icon is displaying but settings window doesn't visible. I have already reinstalled ubuntu desktop and gnome-control-center, but without any success.(reboot also didn't help).If i try to open gnome-control-center in terminal the same result only icon appearce To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1721637/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp